Registration Dossier

Administrative data

Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Scientifically acceptable publication

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Influence of humic substances on Photolysis of nitroaromatic compounds in aqueous systems
Author:
Simmons M.S. & Zepp R.G.
Year:
1986
Bibliographic source:
Water Research 20: 899-904
Reference Type:
secondary source
Title:
European Union Risk Assessment Report, Nitrobenzene, CAS No: 98-95-3
Author:
European Chemicals Bureau
Year:
2007
Bibliographic source:
3rd Priority List, Volume: 77

Materials and methods

Study type:
direct photolysis
Principles of method if other than guideline:
Direct photolysis in water was studied in distilled water and in the presence of humic substances respectively. A very diluted aqueous nitrobenzene solution was exposed to irradiation. The influence of humic substances on photoreactions was determined by comparing results in humus-containing water with those in distilled water.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Nitrobenzene

Study design

Analytical method:
high-performance liquid chromatography
Light source:
other: irradiation
Light spectrum: wavelength in nm:
313
Details on light source:
Artificial light source
- Emission wavelength spectrum: 313
- Filters used and their purpose: Corning 0-52 snf 7-37 filters
Sensitiser (for indirect photolysis)
Type of sensitiser:
OH radical
Duration of test at given test condition
Initial conc. measured:
0 mol/L

Results and discussion

Spectrum of substance
Parameter:
max lambda
Value:
313 nm
Dissipation half-life of parent compound
DT50:
133 d

Any other information on results incl. tables

A direct photolysis constant of 5.2*E-03/d is given.

Applicant's summary and conclusion